Study By Disease

Study By Disease

…853) Anaplastic large-cell lymphoma (Quiz #389) Angiolymphoid hyperplasia with eosinophilia (Quiz #424) Angiosarcoma (Quiz #819) Annular erythema of infancy (Quiz #159) Apocrine papillary cystadenoma (Quiz #299) Arteriosclerosis with calcification of…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Junctional Activity and Active Junctional Nevus?

…ctive junctional nevus, lentigo maligna, atypical melanocytic hyperplasia, mild, moderate, and severe dysplasia, and pagetoid melanocytic proliferation are employed consistently as evasions from a diagnosis of melanoma in situ. None of those terms ha…

Dermatology Practical & Conceptual

The so-called dysplastic nevus is not dysplastic at all

…splastic nevi] fit nicely into the schema of progression from hyperplasia to dysplasia to neoplasia that is accepted in many epithelial tumor systems, both experimental and human” [4]. As one examines the literature, there is really no evidence…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Tricho-, pilo-, folliculo- ?

…bulb. In short, tricholemmoma is not a benign neoplasm, but a hyperplasia. “Tricho-” is applied correctly in the name trichotillomania, in which hair shafts are twisted to and fro until they break, and it also is used properly in the term…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…rule 11. Hyperkeratosis, hypergranulosis, and spinous-cell hyperplasia usual 11. Hyperkeratosis not prominent; no hypergranulosis usually; little epidermal hyperplasia 12. No evidence of regression 12. Foci of regression sometimes 13. Infiltra…

Histologic Diagnosis of Inflammatory Skin Diseases

Pattern Analysis in Historical Perspective

…perficial perivascular dermatitis + spongiosis + psoriasiform hyperplasia = spongiotic psoriasiform dermatitis (allergic contact or nummular dermatitis, fully developed). Figure 5.4 Contents of Histologic Diagnosis of Inflammatory Skin Diseases: A…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Endothelial Swelling?

…erans is manifested by endothelial cell swelling, endothelial hyperplasia and expansion of vessel walls by edema and a lymphohistiocytic infiltrate with luminal attenuation.” Barnhill RL. The treponemal and rickettsial diseases. In: Barnhill R…